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Jonoats · January 9th, 2010, 10:10

Really funny you have experienced this problem. My friend has been building up a beast of an SPR over the years and has a Prowin gearbox installed. Now for all who don't know the hopup unit on this type of gearbox is actually a part of the gearbox. For the longest time he was just getting consistent super low velocity shots. I had a look at it with him and fixed up all his seals, seals are good. First shot out of it, 430fps, every shot after that like 200fps. The problem is definitely stemming from how his nozzle is mating with his hopup, so I inspected and changed it. Now however his gun instantly jams. Could it be that too much hopup is now exposed beyond the barrel? Where there was too little before? It was over the holidays and we ran out of time at this point. It definitely seems that the bb's are jamming between the rubber and the nozzle. Any insights would be appreciated, I'm sure when I get back into town and get some more time on it I can fix it, just really an odd problem.

January 9th, 2010, 10:10	#6
Jonoats Banned Trader rating Join Date: Apr 2009 Location: ON, Canada :)	Really funny you have experienced this problem. My friend has been building up a beast of an SPR over the years and has a Prowin gearbox installed. Now for all who don't know the hopup unit on this type of gearbox is actually a part of the gearbox. For the longest time he was just getting consistent super low velocity shots. I had a look at it with him and fixed up all his seals, seals are good. First shot out of it, 430fps, every shot after that like 200fps. The problem is definitely stemming from how his nozzle is mating with his hopup, so I inspected and changed it. Now however his gun instantly jams. Could it be that too much hopup is now exposed beyond the barrel? Where there was too little before? It was over the holidays and we ran out of time at this point. It definitely seems that the bb's are jamming between the rubber and the nozzle. Any insights would be appreciated, I'm sure when I get back into town and get some more time on it I can fix it, just really an odd problem.